Live Stress Check and Simulation Cross-Permeation


We are an important and well known supplier for the pharmaceutical, healthcare and personal care market and want to stay that way! That’s why we’ve always seen ourselves in the role of being more than a pure supplier of reliable, high-quality packaging materials. That applies, for example, to the development of innovative products such as DryFoil.


It is also about services related to products, which should be a key to the success of our customers. The focus is on safety in packaging development and greater productivity. A good example is the Live Stress Check. This service is used to determine the degree of strain/ deformation of CONSTANTIA Coldform and thus the quality of the forming process in the blister machine. To this end, a pattern of high-resolution dots is printed on CONSTANTIA Coldform. This printed laminate is then subjected to the cold forming process in the blister machine. The forming process changes the distance between the dots. Using a camera and the corresponding software, the change in distance between the dots is measured and a three-dimensional image produced which shows the degree of strain/deformation the Coldform has been subjected to in the formed area. The forming process and the shape of the cavities can be optimized on the basis of this information. The results can be used to reduce rejects and lower costs.


Another and important service is the simulation of the so-called cross-permeation in Coldform blisters packs. This concerns the moisture that permeates into the blister cavity in very small quantities along the inner layers, starting from the punched edge of the blister. This permeation is only possible along the punched edge because the aluminum of the Blisterfoil and base foils creates a hundred percent barrier against water and oxygen. The cross-permeation along the punched edge can be controlled by using laminates whose plastic layers provide a higher barrier to water vapor on the inside layer of the Coldform laminate. Polypropylene can therefore be used instead of polyvinyl chloride, for example. Nevertheless, the cross-permeation can also be influenced by the design of the blister. Either the sealing area can be adjusted to cope with this or the perforations on the Blister can be eliminated.


Our simulation enables us to assess the effect of using different plastics and / or making design changes on the overall cross-permeation, which ultimately impacts the product’s shelf life. When it comes to new developments, the crosspermeation simulation is exactly the right tool for being able to take the right decisions at a very early stage. Expensive iterations can be avoided, especially in terms of laminate selection and blister design. Our services save time and materials and increase productivity. And there’s another benefit: we stay in personal contact with our customers. The work we do together and the interaction we have on projects are important foundations for our efforts in the areas of research & development and application technology, because it teaches us about the new requirements for packaging materials in the pharmaceutical, healthcare and personal care market. This enables us to develop products and services that help our customers.


If you’re interested in finding out more about the Live Stress Check or the Cross-Permeation Simulation, then you’ll find just the right contact persons in Mr. Wilhelm Zuser ( and Mr. Thomas Schwarz (